/*
 * Essential-C - Essential C Libraries for Developers
 * Copyright (c) 2004-2008 Tom Bradford <tom@tbradford.org>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a 
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
 * DEALINGS IN THE SOFTWARE.
 */

#include <stdlib.h>

#include "esc_queue.h"

/* Private Types and Variables ***********************************************/

/* Private Functions *********************************************************/

/* Public Functions **********************************************************/

esc_queue_t* esc_queue_new(esc_mem_t* mem)
{
    esc_queue_t* queue = esc_list_new(mem);

    esc_list_setClusterSize(queue, 32);

    return queue;
}

/*---------------------------------------------------------------------------*/

void esc_queue_add(esc_queue_t* queue, void* item)
{
    esc_list_addItem(queue, item);
}

/*---------------------------------------------------------------------------*/

void* esc_queue_remove(esc_queue_t* queue)
{
    int size = esc_list_getSize(queue);

    if ( size > 0 )
        return esc_list_removeIndex(queue, 0);
    else
        return NULL;
}

/*---------------------------------------------------------------------------*/

void* esc_queue_peek(esc_queue_t* queue)
{
    int size = esc_list_getSize(queue);

    if ( size > 0 )
        return esc_list_getItem(queue, 0);
    else
        return NULL;
}

/*---------------------------------------------------------------------------*/

void esc_queue_removeAll(esc_queue_t* queue)
{
    esc_list_removeAll(queue);
}

/*---------------------------------------------------------------------------*/

int esc_queue_getSize(esc_queue_t* queue)
{
    return esc_list_getSize(queue);
}

/*---------------------------------------------------------------------------*/

bool esc_queue_isEmpty(esc_queue_t* queue)
{
    return esc_list_isEmpty(queue);
}
